1 files changed, 108 insertions, 0 deletions
diff --git a/src/gallium/drivers/etnaviv/etnaviv_util.h b/src/gallium/drivers/etnaviv/etnaviv_util.h
new file mode 100644
index 00000000000..62f62548d2c
--- /dev/null
+++ b/src/gallium/drivers/etnaviv/etnaviv_util.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2012-2015 Etnaviv Project
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/* Misc util */
+#ifndef H_ETNA_UTIL
+#define H_ETNA_UTIL
+
+#include <math.h>
+
+/* for conditionally setting boolean flag(s): */
+#define COND(bool, val) ((bool) ? (val) : 0)
+
+/* align to a value divisable by granularity >= value, works only for powers of two */
+static inline uint32_t
+etna_align_up(uint32_t value, uint32_t granularity)
+{
+   return (value + (granularity - 1)) & (~(granularity - 1));
+}
+
+static inline uint32_t
+etna_bits_ones(unsigned num)
+{
+   return (1 << num) - 1;
+}
+
+/* clamped float [0.0 .. 1.0] -> [0 .. 255] */
+static inline uint8_t
+etna_cfloat_to_uint8(float f)
+{
+   if (f <= 0.0f)
+      return 0;
+
+   if (f >= (1.0f - 1.0f / 256.0f))
+      return 255;
+
+   return f * 256.0f;
+}
+
+/* clamped float [0.0 .. 1.0] -> [0 .. (1<<bits)-1] */
+static inline uint32_t
+etna_cfloat_to_uintN(float f, int bits)
+{
+   if (f <= 0.0f)
+      return 0;
+
+   if (f >= (1.0f - 1.0f / (1 << bits)))
+      return (1 << bits) - 1;
+
+   return f * (1 << bits);
+}
+
+/* 1/log10(2) */
+#define RCPLOG2 (1.4426950408889634f)
+
+/* float to fixp 5.5 */
+static inline uint32_t
+etna_float_to_fixp55(float f)
+{
+   if (f >= 15.953125f)
+      return 511;
+
+   if (f < -16.0f)
+      return 512;
+
+   return (int32_t)(f * 32.0f + 0.5f);
+}
+
+/* texture size to log2 in fixp 5.5 format */
+static inline uint32_t
+etna_log2_fixp55(unsigned width)
+{
+   return etna_float_to_fixp55(logf((float)width) * RCPLOG2);
+}
+
+/* float to fixp 16.16 */
+static inline uint32_t
+etna_f32_to_fixp16(float f)
+{
+   if (f >= (32768.0f - 1.0f / 65536.0f))
+      return 0x7fffffff;
+
+   if (f < -32768.0f)
+      return 0x80000000;
+
+   return (int32_t)(f * 65536.0f + 0.5f);
+}
+
+#endif